Leave it be for this first week as it gets used to its new home. After that start with short sessions a couple times a week and as time goes on and your snake is dealing with you fine and not showing signs of stress start to increase the time and frequency of handling. I would say start off about 15 minutes at first and gradually go up.
Now I handle mine whenever I want and hold them as long as I like but its usually no more than an hour. My big blood probably gets to hang out the longest as she never gets into explore mode like most of the rest.
I usually do not handle on feed day or the two days after as a general rule.